{
  "manageEntity": {
    "action": "Save",
    "entityId": "329604",
    "entityType": "Track",
    "nonce": "0x4be08c653ab894600c321eaaf5bc8f8ebefab14ec5b0d559a64db10c9344bf3f",
    "signature": "0x0b19f194fe39484398f8221b9dd73c99295b094de353afe629785b998145c4da020ab3649cf0b745c51f723ddd7a563a8019594ef55fa17cc606dc26079f3cb81b",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}